Vacuum chalk-eraser cleaner.



0. C. BAUMGART.

VACUUM CHALK ERASER CLEANER;

APPLICATION FILED AUG. '6, 19|5f I Patented July 18 1916..

UNITED STATES PATENT OFFICE.

OTTO C. BAUMGART, F ATASCADERO, CALIFORNIA.

VACUUM CHALK-ERASER CLEANER.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed August 16, 1915. Serial No. 45,733.

To alltvhom it may concern:

Beat known that I, O'r'ro C. BAUMGART, a citizenof the United States, residing at Atascadero, in the county of San Luis Obispo and State of California, have invented new and useful Improvements in Vacuum Chalk Erasei Cleaners, of which the following is a of erasers simultaneously.

4 which settles upon the clothes and particles.

Another object is to provide a chalk eraser cleaner which embodies a fan and a suction opening leading thereto and which includes a mechanism for manually moving the surface of the erasers back and forth under the suctionopening. I

Another object of my device is to provide a pivoted conduit from the fan so that the device may be used in cleaning a single eraser in the hand or for other purposes than that of cleaning dust from erasers.

It is also an object of my device to' provide a machine which is compact and which may be readily operated manually or may be provided with suitable power for its'operation.

Heretofore it has been customary in'cleaning the dust from the felt of erasers to pound them together or against some solid surface, thus knocking a portion of the dust from the erasers and causing it to form a cloud in the air around the person cleaning them, some of are drawn into the lungs of the person, and

furthermore it requires considerable time and labor to efiect an indifferent cleaning operation. In my device these features are eliminated by providing a suitable conduit leading away from the fan and through which any dust or chalk drawn from the felt of the erasers may be readily disposed of in a convenient manner.

My invention is illustrated in the following drawings in which:'

Figure 1 is a .view in side elevation of the complete machine. Fig. 2 is an end eleva- ZLD. eraser.

tion ofthe device. Fig. 3 is a fragmentary view particularly disclosing the means for operating the eraser carriage. plan View of the eraser carriage showing the erasers iii position for cleaning.

More specifically, 10 indicates the frame of my machine upon which is mounted a suitable fan 11 constructed to produce suction within the pivoted conduit 12, which is adustably secared between standards 14 and 15 formed with a slot IG-therein, through which bolts 17 pass and are secured by nuts 18. The suction end of the conduit is turned downwardly and at the same time is widened laterally adjacent its end and is formed with a narrowsuction opening 19 of a suitable width to act upon the face of a number" of erasers at one time. A brush 20 is secured to the suction end of the conduit 12 alongside the opening 19 by means of a bracket 21, said brush being provided to produce a seal between the rear. edge of the opening 19 in the conduit and the eraser 22 fed under the opening '19. The eraser is secured against a stationary clamping j aw 23 by means of a set screw 24 which presses against a clamping block 25, arranged to engage the end of The clamping block is formed with a tongue 29 adapted to move within a slot 30 formed in the base of an eraser car ri age 28 and acting as a guide for the block 25. whi ch"in turn holds the eraser in the pf'oper position upon the eraser carriage by means of the radial surfaces 26 and 27 which conform approximately to the curved ends of ordinary erasers. The eraser carriage may be provided with any convenient number of eraser clamps so as to hold a plurality of erasers. The carriage 28 is moved back and forth underthe inlet 19 of the suction conduit by means of a rack 31 secured to the botto of the carriage and having its teeth projecting downwardly into mesh with a pinion 32 which revolves 'on a shaft mounted in suitable bearings on the frame and 'is rotated by. means of a hand crank 34, which when turned will throw the eraser carriage under the opening of the conduit and into position as indicated in the dotted lines in Fig. 3, the carriage moving on suitable ways 35' secured to the frame of the machine and extendingv longitudinally therewith. Rotation is given to the fan by meansof a hand, crank 36 secured to a shaft 37 mounted within bearings 38 and 39 formed upon the'frame .of the'inachine, and on which shaft 37 a Q lf,1$1,337

In the operation of this device, the erasers' are placed between the stationary clamping ]z1W 23 and the movable clamping aw 25 and secured by means of the screw 24;. The

carriage is then moved back and forth under the suction opening 19 in the fan conduit by rotating the j crank 34:. Simultaneous with this operation, the crank 36 is rotated, which in turn revolves the gear 40 meshing with the pinion 4:1, giving the desired leverage necessary to produce suilicient suction and speed of rotation-of the fan 47, which is mounted Within the case 51. When suilicient suction has been created by the rotation of the 'fan, the draft will be drawn. through the fiber of the eraser into the opening 19 in the conduit 12 and on through the fan and exhausting through the exhaust conduit 52', which may lead into any suitable dust receptacle. In order to facilitate suction action against the fiber of the eraser, the brush 20 is positioned so that it will rub over the surface of the eraser and loosen the dust particles so that the suction draft will be drawn directly through the fiber of the eraser to insure a thorough cleaning there of. v If is desired to utilize the suction device for cleaning a single eraser or for other purposes, the belt 18 may be loosened and the conduit swung upwardly upon a suitable rotating Joint which connects with the fan case 51. An eraser may "then be passed over the suction opening 19 by the hand. it is evident that by merely attaching a motor to the driving gears here shown, motive power may be readily utilized. to drive the I claim:

1. A chalk e 'aser cleaner, comprising a rotary suction tan, a housingtherefor,

means fol-revolving said fan, a suction conduit pivotally connected to the housing, means for holding the conduit in various positions, a reciprocatable carriage, eraser holding means thereon, a crank, and means actuated by said crank for reciprocating the carriage to move erasers thereon back and forth beneath the intake end of the conduit,

the erasers reciprocatively mounted on said frame, means for reciprocating said carriage to move the erasers under the suction end of said conduit, standards on said frame between which said conduit adapted to swing on its pivot, and means for securing said conduit to said standards in various positions.

lntestiinony whereof I have signed n) name to this specification.

OTTU C Billlllitlitltil. 

